package com.yy.filter;

import cn.hutool.core.bean.BeanUtil;
import cn.hutool.core.util.StrUtil;
import com.yy.entity.front.User;
import com.yy.utils.UserHolder;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.web.servlet.HandlerInterceptor;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.Map;
import java.util.concurrent.TimeUnit;

/**
 * create by KongFuning on 2022/8/4
 */
public class RefreshTokenInterceptor implements HandlerInterceptor {

    private StringRedisTemplate stringRedisTemplate;

    public RefreshTokenInterceptor(StringRedisTemplate stringRedisTemplate){
        this.stringRedisTemplate = stringRedisTemplate;
    }

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        // 1、获取session中的token
        String token = (String) request.getSession().getAttribute("token");
        if(StrUtil.isBlank(token)){
            return true;
        }
        // 2、基于token获取redis中的用户
        Map<Object, Object> userMap = stringRedisTemplate.opsForHash().entries("login:token:" + token);
        // 3、判断用户是否存在
        if(userMap.isEmpty()){
            return true;
        }
        // 4、将查到的Hash数据转为User对象
        User user = BeanUtil.fillBeanWithMap(userMap,new User(),false);

        // 5、存在，保存用户信息到ThreadLocal
        UserHolder.saveUser(user);

        // 6、刷新token有效期
        stringRedisTemplate.expire("login:token:" + token,30L, TimeUnit.MINUTES);

        return true;
    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        // 移除用户
        UserHolder.removeUser();
    }
}
